Lazulite and Black Opal Physical Properties

Lazulite

Black Opal

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.04-3.171.97-2.22

1 7.18

1.5 Fracture

Uneven, Uneven, Gemstones of the world (2001) More from other references

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{001} Indistinct, {???} Indistinct

Not Available

1.7 Mohs Hardness

5.56-6.5

2 10

1.8 Chemical Composition

(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

SiO 2 + H 2OUlrich Henn and Claudio C.

Lazulite and Black Opal Chemical Formula

While comparing Lazulite and Black Opal physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Lazulite and Black Opal chemical formula.

Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Lazulite and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazulite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazulite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Lazulite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.